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United States Patent | 6,060,436 |
Snyder ,   et al. | May 9, 2000 |
The crosslinking of galactomannan gum fracturing fluids by borate ion is delayed for high temperature applications by completing boron in a basic solution with an organic polyol. Low pumping friction pressures are achieved by the delay in the crosslinking with the boron being available at high temperatures to add high temperature stability to the fracturing fluid at temperatures ranging upto about 300.degree. F.
Inventors: | Snyder; Travis C. (Tahlequah, OK); Free; Dustin L. (Katy, TX); McConnell; Stanley Bruce (Katy, TX); Ainley; Brian R. (Broken Arrow, OK) |
Assignee: | Schlumberger Technology Corp. (Sugar Land, TX) |
Appl. No.: | 692756 |
Filed: | August 6, 1996 |
Current U.S. Class: | 507/266; 166/308.5; 507/209; 507/211; 507/273; 507/922; 507/924 |
Intern'l Class: | C09K 003/00; E21B 043/17 |
Field of Search: | 507/266,273,922,924,211,209 166/308 |
5082579 | Jan., 1992 | Dawson | 507/211. |
5160445 | Nov., 1992 | Sharif | 507/203. |
5372732 | Dec., 1994 | Harris et al. | 507/217. |
5445223 | Aug., 1995 | Nelson et al. | 166/308. |